37 results about "Premolar" patented technology

A method and system are disclosed for finding virtual tooth features on virtual three-dimensional models of the teeth of patients. The tooth features comprise marginal ridges, cusp tips, contact points, central groove and buccal groove. Tooth axes system plays a key role in identifying the tooth features. An iterative method is disclosed for improving the accuracy of the tooth axes system. A virtual three-dimension model preferably obtained by scanning the dentition of a patient forms the basis for determining the tooth features. Tooth features are derived for all categories of teeth including molars, premolars, canines and front teeth. Tooth features are very helpful and used in planning orthodontic treatment. The tooth features are determined automatically using the computerized techniques; and can be manually adjusted when necessary.

System and method for automatic construction of the tooth's axes in terms of three orthogonal unit vectors are disclosed. Three dimensional data for a tooth is used to automatically construct the tooth's axes. System and methods for automatic construction of the axes for different types of teeth such as incisors, canines, premolars, and molars are disclosed.

System and method for automatic construction of the tooth's axes in terms of three orthogonal unit vectors are disclosed. Three dimensional data for a tooth is used to automatically construct the tooth's axes. System and methods for automatic construction of the axes for different types of teeth such as incisors, canines, premolars, and molars are disclosed.

An odontological device and device series to guide an individual's occlusion and a method to be used in choosing an occlusion guidance appliance device to be used in orthodontic treatment. This kind of device contains a U-shaped arch with a lower surface on the side of the lower jaw and a higher surface on the side of the upper jaw, and in both of which there are concaves in which to place the individual's teeth, and where the bottoms of the concaves form the bridge separating the concaves from one another. According to the invention, the hollows designed for the back teeth consist of uniform compartments, which start from the second premolar and continue towards the molars at least to the area where the second permanent molar will erupt. The presented device is suitable for use in all dental arch developmental phases. In particular, because of the advantageous forms of the device are applicable to all kinds of malocclusions, a large stock of different devices for people of different ages and with different types of occlusion guidance appliance are not required at the dentist's surgery.

A mouthpiece includes a first body configured to be secured over one or more teeth of a user. The first body comprises a frame for location about at least one of a molar or a premolar of user, as a first bite pad between upper teeth and lower teeth. The first bite pad is molded in the frame while in situ in the mouth of the user and the first bite pad is formed by a PVS material. The first bite pad is in contact with at least one of a molar or a premolar of user, and the first bite pad defines an exterior shape of at least a portion of the teeth of a user. There is a similar second body with a connector between the first body and the second body and together these form the appliance for the user.

The invention relates to the technical field of orthodontics, and discloses an orthodontics treatment device. The device comprises a lingual-side cast web plate wore on maxillary incisors, a plane guide plate arranged on the surface of the cast web plate, and combination cast crowns connected to two ends of the cast web plate, wherein each combination cast crown contains maxillary ipsilateral cuspid teeth and a first front premolar. A buccal-side hook connection bar and a lingual-side (occlusal) rest connecting rod extend out of each combination cast crown. The hook connection bar is connected to a lowering hook, which is arranged in the buccal-side center of to-be-lowered maxillary molars. The (occlusal) rest connecting rod is connected to an (occlusal) rest, which is arranged on rear molars of the to-be-lowered maxillary molars. Through the orthodontics treatment device, occlusion can be opened and elongated maxillary incisors are lowered at the same time, and the problem of multiple staggered occlusion is solved. The device is beneficial for saving curative time and cost and relieving wound suffered by patients during a therapeutic process.

The invention relates to a multi-directional arch expanding device which comprises a plastic base plate coincident with a cavity of the palate of a patient, spiral opening devices, first premolar metal retention union crowns on the left side / right side, second premolar metal retention union crowns on the left side / right side, first molar metal retention single crowns on the left side / right side and arch wires. The plastic base plate is divided into premolar area base plate bodies on the left side / right side and molar area base plate bodies on the left side / right side, the premolar area base plate body on the left side is connected with the molar area base plate body on the left side through the spiral opening devices, the premolar area base plate body on the right side is connected with the molar area base plate body on the right side through the spiral opening devices, the premolar area base plate body on the left side is connected with the premolar area base plate body on the right side through the spiral opening devices, and the arch wires are placed in MBT brackets of the first premolar metal retention union crowns on the left side / right side and the second premolar metal retention union crowns on the left side / right side and MBT cheek tubes of the first molar metal retention single crowns. The multi-directional arch expanding device has the advantages that bony structures of all teeth and the anterior palate part before the premolars on the two sides provide a strong support for distal movement of premolars; the metal crowns well control the vertical directions and the horizontal directions of the back teeth, tooth extending, lowering or twisting possibly occurring in distal movement is avoided.

The invention discloses a mandible guiding forward and fixed orthodontic combined correction device, which comprises a maxillary correction device and a mandibular correction device, wherein the maxillary correction device comprises a first metal joint crown and a palate rod which are arranged on a first molar and a second premolar or a second primary molar, a first buccal tube (the formula is shown in the formula) and a pad are arranged on the first metal joint crown, an upper dentition main arch wire is arranged on the first buccal tube, (the formula is shown in the formula) and a power armis arranged on one side of the pad; the mandibular correction device comprises a second metal joint crown and a tongue arch which are arranged on the first molar and the second premolar or the primarymolar, a second buccal tube is arranged on the buccal side of the second metal joint crown, a lower dentition main arch wire is arranged on the second buccal tube, the second metal joint crown is provided with (the formula is shown in the formula) a blocking arm which matches with the power arm of the pad. According to the mandible guiding forward and fixed orthodontic combined correction device,the maxillary power arm and the mandibular blocking arm are matched to realize that the mandible is guided forwards, and the fixed correction is realized through the bracket, the upper dentition mainarch wire and the lower dentition main arch wire arranged on the tooth surface, so that the device has the advantages of strong support, convenient operation, good correction effect, sound patient experience and the like.

Method for automatically assigning numeric labels to teeth in a dental arch map provides a segmented 3D surface image of patient dentition having identified individual teeth and determined tooth position in the dental arch. A tooth contour for the identified teeth is defined. The tooth type is identified as one of incisor, canine, premolar, or molar. A display of the tooth contour is labeled with an assigned tooth number according to the tooth position, tooth contour, and tooth type. The labeled mapping is displayed.

The invention discloses a device for moving a molar to far-middle based on a micro-implant anchorage. The device comprises a main arch wire, a bracket, an auxiliary arch wire, buccal tubes, an anchorage element, and a force applying element. The number of buccal tubes is three, the first buccal tube is attached to a first premolar, and the second buccal tube is attached to a first molar. The auxiliary arch wire is used for connecting the first buccal tube and the second buccal tube, and the auxiliary arch wire is positioned above the bracket of a second premolar. The first molar is further attached to the third buccal tube. The first buccal tube is tightly adjacent to the far-middle end of the bracket of the first premolar, and the second buccal tube is tightly adjacent to the near-middleend of the third buccal tube. The main arch wire passes through the first buccal tube, the second buccal tube and the third buccal tube, and is fixed in the above buccal tubes. The force applying element is connected with the anchorage element, and applies a traction force parallel to the main arch wire to the auxiliary arch wire. The traction force points to a far-middle direction. The provided technical scheme is capable of simply and effectively moving the molar to the far-middle, and saving time and reducing economic cost for a clinic operation.

An impression tray set for edentulous jaw, including a pair of a maxillary impression tray and a mandibular impression tray for use in taking an intraoral impression of an patient including an edentulous patient, and capable of simultaneously recording bite position and height when taking the impression, is provided.An impression tray set for edentulous jaw is formed by a maxillary impression tray 1 and a mandibular impression tray 2 respectively including a tray main body 4 having a U-shaped groove on which an impression material is to be applied on a front surface side thereof, an engaging part formed on a back surface of the U-shaped groove in a position corresponding to an alveolar ridge of front teeth, and a handle part 6 that is detachably connected to the engaging part, and each of the maxillary impression tray 1 and the mandibular impression tray 2 includes projecting parts 7 being provided on the back surface, at left and right portions of the U-shaped groove in a position corresponding to an alveolar ridge from a first molar part to a premolar part, the projecting parts 7 being used for determining bite position and height in a state in which at least a part of flat top surfaces 7a of the projecting parts 7 contact each other when taking an impression.

A dental appliance apparatus is disclosed herein. In various aspects, the dental appliance may include a body removably attachable to one or more teeth selected from premolars and molars, and a flange extending forth from lingual portions of the body to contact a tongue at one or more locations proximate the premolars and the molars in order to cause a contraction of the genioglossus that positions the tongue anteriorly and downward toward the mandible by stimulation of the hypoglossal nerve. The dental appliance may include a connector connected to the body, and the connector may pass about buccal-labial sides of the anterior teeth. A bumper may be included on a labial side of the connector, and the bumper may contact the lips to promote pursed lips breathing. An anterior flange may extend lingually from the connector to stimulate the hypoglossal nerve proximate a tip of the tongue in order to cause contraction of the genioglossus to position the tongue anteriorly and downward toward the mandible. This Abstract is presented to meet requirements of 37 C.F.R. §1.72(b) only. This Abstract is not intended to identify key elements of the apparatus and methods disclosed herein or to delineate the scope of this disclosure.

A miniaturized mouthpiece for repositioning the user's mandible, thereby creating an edge to edge relationship of the user's anterior teeth, without covering or extending to the user's posterior teeth. This miniaturized mouthpiece may be formed from a substantially trapezoidal mouthpiece blank having major and minor sides that are substantially parallel to one another. These major and minor sides may be connected by two equal length non-parallel sides. This blank will typically have a gently curved and raised contact area that follows the curvature of the user's anterior dental arches. The mouthpiece blank will often be made of a thermoplastic material, so that upon application of heat, the blank can be deformed around the user's maxillary central incisors and often the user's maxillary lateral incisors as well, thus creating a mouthpiece that does not cover the user's molars or premolars, yet which creates an interocclusal gap when worn.

The invention relates to an auxiliary transparent appliance molar remote shifting device and a manufacturing method thereof. The shifting device comprises second premolars on both sides of the upper jaw, a first molar and a second molar, wherein the second premolars, the first molar and the second molar are respectively provided with a permanent magnet mold; the permanent magnet mold is subjected to clinical mold taking to obtain a tooth model; and the teeth model is subjected to computer simulation to obtain the tooth remote / medium motion process, and is subjected to 3D printing and film pressing techniques to obtain a correction tooth socket. The permanent magnet mold is bonded to the tooth buccal surface by an adhesive, clinical mold taking is carried out, the model is subjected to computer scanning, simulated tooth treatment is carried out on tooth motion software, and the transparent correction tooth socket is obtained by 3D printing. Thus, the correction tooth socket can adjust the position of the permanent magnet at any time according to the remote / medium motion direction, thereby achieving the goal of stably correcting the tooth, and effectively lowering the use cost of the user.

The invention discloses a tooth socket for protecting teeth. The tooth socket for protecting teeth comprises a tooth socket and a dental face, wherein the tooth socket comprises an upper tooth socket and a lower tooth socket which are paired, the tooth socket comprises the outer side surface, the inner side surface and the masticating surface and is sampled, produced and molded according to a dental pattern supporting die of a user, the outer side surface is the continuous curved surface attached on the outer side of a dental pattern, the inner side surface is the curved surface which is attached on the inner side of the dental pattern and provided with a plurality of spring pieces between premolars and molars, the masticating surface is arranged between the outer side surface and the inner side surface, the dental face is sampled, produced and molded according to the dental pattern supporting die of the user, and the dental face is bound on the masticating surface through a binding agent. By wearing the tooth socket when eating, the stress present status of the teeth during masticating can be balanced, food residue can be prevented from entering gaps between the teeth, the breeding of microorganisms can be reduced, the whole stress state of the teeth can be balanced and strengthened, and the service life of the teeth can be prolonged, thereby playing a role in effectively protecting the teeth for patients with dental diseases or people with the healthy teeth.

Mouth protector device with tongue depressor, comprising a first cover (1) for protecting the lip and the teeth of the upper jaw and a second cover (2) for protecting the lip and the teeth of the lower jaw, both covers being connected and articulated in relation to each other by an opening and locking regulator (3), which holds the patient's mouth open for the introduction of exploration or operating instruments through the oral cavity, wherein the second cover (2) has a through groove (4) for the insertion of a semi-rigid tongue depressor (5) which depresses and holds back the tongue. The first (1) and second (2) covers further comprise side extensions (6) for protecting the row of premolars and molars and at least one tape (7) for connecting the rear ends thereof, said tape passing around the rear part of the patient's head, in order to provide the device with increased stability.

Systems and methods for systems and methods for improvement of a person's performance and well-being by determining and maintaining an orthopedically optimized position of the person's jaw. In one embodiment, TENS is applied to the patient's jaw muscles to relax and deprogram the muscles, the person's TMJs are evaluated and reduced, and neural shear in the patient's upper cervical spine is minimized by orthopedically aligning the patient's head and neck (CC complex), thereby causing the patient's jaw to move toward an orthopedically optimized position (CM complex). A bite registration of the upper and lower jaws is taken, with molars and premolars at least 2 millimeters apart, the front teeth not touching, and preferably a vertical index of 17-21 millimeters. Molds of the persons upper and lower teeth may be positioned using the bite registration, and an orthopedic alignment device (OAD) may be formed between the molds.

The invention belongs to the medical equipment field, and relates to a sliding rod type tooth retrusion device. The device comprises brackets (8), a correction arch wire (9), an h-shaped sliding rod (10), a nickel-titanium spring (11), a micro-implant anchorage nail (12) and an elastic ring steel wire (13). The device enables the premolars to be pushed backward and the whole maxillary dentition to retrude through changing the number of continuously bundled teeth, the draft arm of the sliding rod can be positioned in a gingival position or an occlusion position, the action point of the draft arm can be ascended or descended as needed, the vertical direction of teeth is applied with affection force when the position of the action point is different, and the positions of anterior teeth are controlled through using the vertical force as needed, so the device has the functions except the tooth retrusion. The micro-implant anchorage nail and other parts are routing materials which can be easily obtained, and the sliding rod can be bent by itself, so the whole device has the advantages of low cost and low price.

A customizable scuba-diving mouthpiece for gripping with a diver's teeth, the mouthpiece including including a front member forming a horizontal passageway and a U-shaped back member with a pair of leg portions each including a thermoformable custom-moldable bite portion which in some embodiments is substantially X-shaped in cross-section along the bite-line. Upper-inner and lower-inner wall-portions of each leg portion may terminate rearwardly beside the diver's premolars and forward of the diver's first molar, thereby reducing gagging effect. The passageway may be defined by tapered inner sidewall portions defining the greatest between-sidewall-portions cross-dimension at the leg portions. A bite-limiter may be inserted into the passageway and includes a bite-limiting portion positioned for engagement with the diver's incisors to control the degree of bite and depth of tooth impressions, the bite-limiting portion having a thickness no greater than one third of a passageway vertical dimension.

Orthodontic devices for segmental distalization in a patient are provided. The orthodontic device includes an elongated central arm; a distal part comprising a distal base surface adapted for attachment to a lingual surface of a molar, wherein the distal part is located at a distal end of the central arm. The device also includes a mesial part comprising a mesial base surface adapted for attachment to a lingual surface of a premolar, wherein the mesial part is located at a mesial end of the central arm. The mesial part and / or distal part comprising a first retention element for retention of a first end of an elastic element. The central arm is shaped to substantially follow a lingual side of a set of teeth. The present disclosure further relates to orthodontic kits and to methods for mounting orthodontic devices and to methods for treatment of malocclusions.

A toothbrush for a pet dog is disclosed, in which a groove is longitudinally formed in a center of a head in a direction of a handle, and a cushion material is provided in a surrounding surface, a lower surface and the groove. When a pet dog bites a toothbrush with teeth during a tooth brushing, it is possible to prevent teeth from fracture while preventing a lot of pain occurring when teeth collide with a hard toothbrush. Toothbrush hairs planted in a head are shaped depending on a tooth shape of a pet dog, so it is possible to reliably brush off plague attached on the upper side of a cervical ridge of premolars and molars of a pet dog without applying over stimulation on the gum.